ConvectiveHeatTransferSideIntegral

Computes the total convective heat transfer across a boundary.

Description

This postprocessor computes the total heat flux by integrating the product of the temperature difference and the heat transfer coefficient over a set of boundaries.

where is the set of boundaries, is the solid temperature, is the fluid temperature, and is the heat transfer coefficient.

This postprocessor is useful for ensuring conservative transfers when Robin boundary conditions are used.

Example Input File Syntax

[Mesh]
  type = MeshGeneratorMesh

  [./cartesian]
    type = CartesianMeshGenerator
    dim = 2
    dx = '0.45 0.1 0.45'
    ix = '5 1 5'
    dy = '0.45 0.1 0.45'
    iy = '5 1 5'
    subdomain_id = '1 1 1
                    1 2 1
                    1 1 1'
  [../]

  [./add_iss_1]
    type = SideSetsBetweenSubdomainsGenerator
    primary_block = 1
    paired_block = 2
    new_boundary = 'interface'
    input = cartesian
  [../]

  [./block_deleter]
    type = BlockDeletionGenerator
    block = 2
    input = add_iss_1
  [../]
[]

[Variables]
  [./temperature]
    initial_condition = 300
  [../]
[]

[AuxVariables]
  [./channel_T]
    family = MONOMIAL
    order = CONSTANT
    initial_condition = 400
  [../]

  [./channel_Hw]
    family = MONOMIAL
    order = CONSTANT
    initial_condition = 1000
  [../]
[]

[Kernels]
  [./graphite_diffusion]
    type = HeatConduction
    variable = temperature
    diffusion_coefficient = 'k_s'
  [../]
[]

[BCs]
  ## boundary conditions for the thm channels in the reflector
  [./channel_heat_transfer]
    type = CoupledConvectiveHeatFluxBC
    variable = temperature
    htc = channel_Hw
    T_infinity = channel_T
    boundary = 'interface'
  [../]

  # hot boundary on the left
  [./left]
    type = DirichletBC
    variable = temperature
    value = 1000
    boundary = 'left'
  [../]

  # cool boundary on the right
  [./right]
    type = DirichletBC
    variable = temperature
    value = 300
    boundary = 'right'
  [../]
[]

[Materials]
  [./thermal]
    type = GenericConstantMaterial
    prop_names = 'k_s'
    prop_values = '12'
  [../]

  [./htc_material]
    type = GenericConstantMaterial
    prop_names = 'alpha_wall'
    prop_values = '1000'
  [../]

  [./tfluid_mat]
    type = PiecewiseLinearInterpolationMaterial
    property = tfluid_mat
    variable = channel_T
    x = '400 500'
    y = '400 500'
  [../]
[]

[Postprocessors]
  [./Qw1]
    type = ConvectiveHeatTransferSideIntegral
    T_fluid_var = channel_T
    htc_var = channel_Hw
    T_solid = temperature
    boundary = interface
  [../]

  [./Qw2]
    type = ConvectiveHeatTransferSideIntegral
    T_fluid_var = channel_T
    htc = alpha_wall
    T_solid = temperature
    boundary = interface
  [../]

  [./Qw3]
    type = ConvectiveHeatTransferSideIntegral
    T_fluid = tfluid_mat
    htc = alpha_wall
    T_solid = temperature
    boundary = interface
  [../]
[]

[Executioner]
  type = Steady
[]

[Outputs]
  csv = true
[]
(modules/heat_transfer/test/tests/postprocessors/convective_ht_side_integral.i)

Input Parameters

  • T_solidThe solid temperature.

    C++ Type:std::vector<VariableName>

    Controllable:No

    Description:The solid temperature.

  • boundaryThe list of boundary IDs from the mesh where this object applies

    C++ Type:std::vector<BoundaryName>

    Controllable:No

    Description:The list of boundary IDs from the mesh where this object applies

Required Parameters

  • T_fluidName of the fluid temperature material property

    C++ Type:MaterialPropertyName

    Controllable:No

    Description:Name of the fluid temperature material property

  • T_fluid_varThe fluid temperature.

    C++ Type:std::vector<VariableName>

    Controllable:No

    Description:The fluid temperature.

  • execute_onTIMESTEP_ENDThe list of flag(s) indicating when this object should be executed, the available options include FORWARD, ADJOINT, HOMOGENEOUS_FORWARD, ADJOINT_TIMESTEP_BEGIN, ADJOINT_TIMESTEP_END, NONE, INITIAL, LINEAR, NONLINEAR, POSTCHECK, TIMESTEP_END, TIMESTEP_BEGIN, MULTIAPP_FIXED_POINT_END, MULTIAPP_FIXED_POINT_BEGIN, FINAL, CUSTOM.

    Default:TIMESTEP_END

    C++ Type:ExecFlagEnum

    Options:FORWARD, ADJOINT, HOMOGENEOUS_FORWARD, ADJOINT_TIMESTEP_BEGIN, ADJOINT_TIMESTEP_END, NONE, INITIAL, LINEAR, NONLINEAR, POSTCHECK, TIMESTEP_END, TIMESTEP_BEGIN, MULTIAPP_FIXED_POINT_END, MULTIAPP_FIXED_POINT_BEGIN, FINAL, CUSTOM, TRANSFER

    Controllable:No

    Description:The list of flag(s) indicating when this object should be executed, the available options include FORWARD, ADJOINT, HOMOGENEOUS_FORWARD, ADJOINT_TIMESTEP_BEGIN, ADJOINT_TIMESTEP_END, NONE, INITIAL, LINEAR, NONLINEAR, POSTCHECK, TIMESTEP_END, TIMESTEP_BEGIN, MULTIAPP_FIXED_POINT_END, MULTIAPP_FIXED_POINT_BEGIN, FINAL, CUSTOM.

  • htcName of alpha_wall material property

    C++ Type:MaterialPropertyName

    Controllable:No

    Description:Name of alpha_wall material property

  • htc_varHTC variable

    C++ Type:std::vector<VariableName>

    Controllable:No

    Description:HTC variable

  • prop_getter_suffixAn optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.

    C++ Type:MaterialPropertyName

    Controllable:No

    Description:An optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.

  • use_interpolated_stateFalseFor the old and older state use projected material properties interpolated at the quadrature points. To set up projection use the ProjectedStatefulMaterialStorageAction.

    Default:False

    C++ Type:bool

    Controllable:No

    Description:For the old and older state use projected material properties interpolated at the quadrature points. To set up projection use the ProjectedStatefulMaterialStorageAction.

Optional Parameters

  • allow_duplicate_execution_on_initialFalseIn the case where this UserObject is depended upon by an initial condition, allow it to be executed twice during the initial setup (once before the IC and again after mesh adaptivity (if applicable).

    Default:False

    C++ Type:bool

    Controllable:No

    Description:In the case where this UserObject is depended upon by an initial condition, allow it to be executed twice during the initial setup (once before the IC and again after mesh adaptivity (if applicable).

  • control_tagsAdds user-defined labels for accessing object parameters via control logic.

    C++ Type:std::vector<std::string>

    Controllable:No

    Description:Adds user-defined labels for accessing object parameters via control logic.

  • enableTrueSet the enabled status of the MooseObject.

    Default:True

    C++ Type:bool

    Controllable:Yes

    Description:Set the enabled status of the MooseObject.

  • execution_order_group0Execution order groups are executed in increasing order (e.g., the lowest number is executed first). Note that negative group numbers may be used to execute groups before the default (0) group. Please refer to the user object documentation for ordering of user object execution within a group.

    Default:0

    C++ Type:int

    Controllable:No

    Description:Execution order groups are executed in increasing order (e.g., the lowest number is executed first). Note that negative group numbers may be used to execute groups before the default (0) group. Please refer to the user object documentation for ordering of user object execution within a group.

  • force_postauxFalseForces the UserObject to be executed in POSTAUX

    Default:False

    C++ Type:bool

    Controllable:No

    Description:Forces the UserObject to be executed in POSTAUX

  • force_preauxFalseForces the UserObject to be executed in PREAUX

    Default:False

    C++ Type:bool

    Controllable:No

    Description:Forces the UserObject to be executed in PREAUX

  • force_preicFalseForces the UserObject to be executed in PREIC during initial setup

    Default:False

    C++ Type:bool

    Controllable:No

    Description:Forces the UserObject to be executed in PREIC during initial setup

  • outputsVector of output names where you would like to restrict the output of variables(s) associated with this object

    C++ Type:std::vector<OutputName>

    Controllable:No

    Description:Vector of output names where you would like to restrict the output of variables(s) associated with this object

  • use_displaced_meshFalseWhether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.

    Default:False

    C++ Type:bool

    Controllable:No

    Description:Whether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.

Advanced Parameters

Input Files

References

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